That's perfect, going to test that out now. The script itself doesn't work because it is only for Ubuntu users, not a general case, but I'm trying to get this into Salt so have to tear it apart anyway. The answer file example is in there, though, so that works great. Also this is 8.6 that they show, so the install script would need to be updated anyway.

@scottalanmiller yes, you are right.
I believe Split DNS will only apply sometimes to a single host deployment (To be honest my first installs of Zimbra were this way). Multiple hosts deployment and different roles should not use it and have an already internal DNS infrastructure working.

I documented in another post so that we can find the actual answer files. I had to pull them out of the original script and check a bit to make sure that they do what we are looking for. Now to work on integrating them into Salt so that an install can be properly automated in that manner.